What signal does the Rosemount-2130 tuning fork switch output?
Thread Content
This post was last edited by liu530014416 on 2020-7-20 20:22. Currently, red modules are being used, and the DCS terminal board is ECS700 TUA711-DIR32; it seems to not support 2130.
Judging from this diagram, it’s a regular digital signal; if there is a model number, it can be verified specifically. As for whether the card slot is supported, that’s not clear
It features a two-wire output: the voltage drop is 12V when it is conducting, and the full voltage drop occurs when it is not conducting. Its output characteristics are not compatible with 24V relay coils.
I did the testing: when the output is 0, it’s around 7V, and when the output is 1, it’s 15V. So what type of card should be used with the DCS?
This post was last edited by Dongcidadi on 2020-7-30 at 09:42. The channels corresponding to the level switches should be connected according to the active signal wiring method described in section 3.3 of the module instructions.
The switching element inside the cabinet must be able to distinguish between the outputs of the tuning fork (7V and 15V) as two input states (0, 1). The DI input circuit designed for dry contacts (switches with 0 voltage drop) typically operates at 18V for opening and 5V for closing. It seems that the DI card of a PLC (designed for voltage drop switches), such as those from Siemens, might have compatible parameters. The coil of the 24V relay also has inappropriate parameters. . . If that doesn’t work, switch to another module. However, wiring needs to be added on-site, whether you use a 4-wire system or a PNP 3-wire system.